Question

Which statements about geologic time are true?

Answer 1

●The geologic time scale is a record of the GEOLOGIC EVENTS AND THE EVOLUTION OF LIFE FORMS as shown in the fossil record

●The first step in developing THE GEOLOGIC TIME SCALE was studying rock layers and index fossils worldwide.

Answer 2

the awnser is

Scientists developed the geologic time scale as they studied rock layers and index fossils.

Step-by-step explanation:

Precambrian time makes up 88 percent of Earth’s history.

The first birds appeared during the Jurassic period.

Humans appeared during the Cenozoic era.